Improvement in sewing-machines



A. R. PAiNE.

Sewing Machine.

Patented Manch 6,1860.

Unirse drains Paritair Ormea ALVIN It. PAINE, OF NEV YORK, N. Y.,ASSIGNOR TO JOHN M. MYERS, OF SAME PLACE.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Leiters Patent No. 27,4 l?, dated Marchlhfl() T0 all whom it may concern.'

Be it known that I, ALVIN P. PAINE, of the city and Siate of New York,have invented and made certain new and useful. Improvements inSewing-Machines; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making part of thisspecification, wherein- Figure I is an elevation of the sewing-machinewith the feeding device in place, the bed being in section. Fig. 2 is asection of the feeding-wheel, and Fig. 3 is aside elevation of thetension apparatus of the needle-thread.

Similar marks of reference denote the same parts.

In sewing-machines heretofore constructed feeding-wheels have been usedin which various friction-clamps have been applied to cause the feed toprogress regularly with an intermitted movement.

My said invention relates to this character of well-known feed, and itconsists in two elamping-segments set within a rim or hub on thefeed-wheel, and acted on by a cam movement at the center of thefeed-wheel in such a manner that the said feed-wheel receives a motiondue to the vibration of the lever carrying said cam, and the clamps andmechanism coni trolling their movement, as hereinafter detailed.

In the drawings, a represents the bed; l), the needle-arm; c, theneedle-bar, and d the needle, of any usual size, shape, or character,and, operating in the usual manner, need no further description.

e is the feeding-wheel, set on the spindle and projecting slightlythrough the bed a.

1 is a ring-flange projecting from the side of the wheel e, within andto which ring the apparatus for imparting movement to said wheel hasheretofore been applied, my invention relating to the special mechanismapplied at this point, the same consisting of two clampingsegments, g g,formed as nearly semicireular blocks, with a portion of the edge of eachremoved, as at 2 2, the object of this being to make a more uniform wearagainst the inside ofthe ring 1, because if these clamping-pieces werecomplete semicireles, then the wear on the entire edge being nearlyequal, the semicircle would become too small for the inside of the ringl, and when said semicircular clamps were pressed apart toward thefeeding-rin g the edges only of such elamps that are at right angles totheir line of separation would take a bearing and a rocking motion tothe extent ofthe difference in diameter of the ring-flange l, and the elamps would be the inevitable consequence, hence I remove the segments atthese points 2 2, so that the bearings will be at the ends of eachclamp, and the wear will be uniform and the surfaces will alwayscoincide with each other. At the center part of these elamps g g, Iprovide the cam-shaped openings 3 3, (shown by dotted lines in Fig. 1,)and into these the cam-block 5 on the lever 7L sits. This lever h isacted on by a cam, z', or by a connecting-rod and crank, or any suitablemechanism that will communicate the desired extent of vibrating motion.This lever works on the center pin or spin dle, f, and as the bl ook 5comes in contact with the cam-surfaces 3 3 the segments g g are forcedasunder against the inside of the ring 1, and any further movement ofthe lever turns the feed-wheel and gives motion to the cloth in thesewing-machine. As the levcrL is moved in the other direction the parts3 and 5 are first relieved and the segments may be drawn back with thelever, ready to take the next hold on the wheel e by the spring k actingon the pin 6. I, however, prefer that a positive extent of reeiproeationbe given to the lever h, and that the adjustment for the length ofstitch be eifected by the screw 7, attached to one of clamping-segmentsg.

It will be apparent that where a given amount of motion is communicatedeach time to the lever hf, and the screw 7 is so adjusted that the levermoves some distance before taking the screw, the clamping-segments gwill be moved but little and the feed be very small; but when the screwand lever are in contact, or nearly so, the back movement given to thesegments g is greater and the feed increased. The screw 7 might be onthe lever 7L and take a block on the segment g.

Z is a friction-spring against the feed-wheel to prevent slight frictionturning it back.

rIhe spool m for the needle-thread is mounted on a spindle, a, revolvingin asoeket, o. Said spindle has a disk, S, formed on or attachedthereto, having washers 9 and 10, of cloth or similar material, on thesides thereof. p is a spring resting at 11 on the arm b, and having aneye around the spindle n, said spring resting on the washer 10. q is ati ghtening-screw. rIhe spool m is firmly attached to this spindle bythe conical nut 12 and cone 13, so that the spindle 'n and spool m mustrevolve together.

It will now be evident that as the screw q is tightened the disk 8 isconfined with greater friction and the tension increased, or ifslackeiied the tension is lessened. By this device the friction is verymuch more regular and can be more easily adjusted than in any device Iam acquainted with, and the spools can be changed without varying thefriction.

I do not claim a feeding-wheel, nor a ringiiange or such feedingwheel,to which friction is applied; neither do I claiin herein a lever initself by which a clamping movement is given to segments acting on saidring; but

Vhat I claim, and desire to secure by Letters Patent, is

1. The clamping-segments g g, Within the ring 1 of the feeding-wheel,when said segments are formed with the fiat side or removed portion at 22, for the purposes and as speciiied.

2. The coiinbination of the vibrating lever l1y and segments gg, whenthe segments are 'formed with the cam-shaped openings 3 3 at theircenters, acted on by the block 5 ofthe lever, in the manner and for thepurposes speciiied.

In witness whereof I have hereunto set my signature this 16th day ofNovember, 1859.

, A. 'R'. PAINE.

Vitnesses:

LEMUEL XV. SERRELL, Trios. GEO. HAROLD.

